Here is the Masiakasaurus, an animal whose fossils were found in Madagascar. Its most interesting feature would have to be the fact that its two bottom front teeth stick out of its mouth in a horizontal fashion.

A small, Halfling-sized carnivore surfaces from beneath the water. It appears much like a raptor, except its two front bottom teeth protrude horizontally.

Masiakasaurus (“vicious lizard”) is a small predator that lives in tropical savannas. It spends most of its time swimming in shallow rivers. Despite its fearsome appearance (its teeth are serrated and all point outwards), its teeth are delicate tools inefficient in combat (especially the two front teeth), used to catch fish and other tiny aquatic creatures. Masiakasaurs do occasionally hunt larger prey, but only in groups.

CombatMasiakasaurs rarely engage in combat with larger foes, but when they do, they lie in wait in the shallowest parts of their rivers, waiting for prey to come and take a drink. They charge (carefully, so as not to damage their front teeth) and swarm their enemies.

Powerful Charge (Ex): A Masiakasaurus can begin combat by piercing an enemy with its front teeth. In addition to the normal benefits and hazards of a charge, this allows the Masiakasaurus to make a gore attack with a +4 attack bonus that deals 3d4 points of damage (a Masiakasaurus is treated as being proficient with their bite in this case).